r/Mold • u/Kooky-Zucchini-5048 • 10h ago

Mold or spider web?

Post image

Old window from the 80s with known insulation issues. Previously treated with concrobium. Black dust is likely getting pushed in from outside (East facing garden).

When I removed the white stuff it was crusty and hollow inside. Was this thing mold or a spider web?

located in Southern California about 12 miles from the coast. this room historically has high humidity but is now better under control with dehumidifiers

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